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      Scientific American July 06, 1918

      Gravitation—I

      And the Principle of Relativity

      • By A. S. Eddington on July 6, 1918

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      More in the July 06, 1918 issue of Scientific American
      • Bird Life of a Big City
      • Safety First for Foundrymen
      • The Relation of Locomotive Maintenance to Fuel Economy
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